question

Arkadiy Demchenko avatar image
Arkadiy Demchenko asked ·

Transmit AOVs incorrect for custom AOVs in semi-transmissive areas and on empty bg

I want to get RGB masks for objects in refraction (street behind the window or pupil/iris behind cornea) and create custom AOV with solid colors for that. Transmit AOVs option works fine, but fails in two situations:

1) any transmission weight below 1.0 counts as 0 and instead of the smooth gradient I get a hard line;

2) on empty bg custom AOV returns glass values instead of 0.

Here's a simple example - top plane has a transmission weight mapped with a gradient and red ramp in custom AOV... Bottom plane has blue ramp in custom AOV:

That's what I get in custom AOV - gradient is not respected and areas over nothing are red from the top plane:

Here's the scene:

transmitaovs02.zip

In a more practical situation I have a gradient in transmission weight for the cornea edge, but custom AOV is sharp and doesn't match (green-blue edge):

aovtransmission
beauty.jpg (63.7 KiB)
custom.jpg (55.1 KiB)
eye.png (68.0 KiB)
transmitaovs02.zip (12.4 KiB)
10 |600 characters needed characters left characters exceeded

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

1 Answer

· Write an Answer
Ashley Handscomb Retallack avatar image
Ashley Handscomb Retallack answered ·

This was already reported, we have made a ticket for this.

Share
10 |600 characters needed characters left characters exceeded

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Write an Answer

Hint: Notify or tag a user in this post by typing @username.

Up to 5 attachments (including images) can be used with a maximum of 2.0 MiB each and 9.8 MiB total.

Welcome to the Arnold Answers community.

This is the place for Arnold renderer users everywhere to ask and answer rendering questions, and share knowledge about using Arnold, Arnold plugins, workflows and developing tools with Arnold.

If you are a new user to Arnold Answers, please first check out our FAQ and User Guide for more information.

When posting questions, please be sure to select the appropriate Space for your Arnold plugin and include the plugin version you are using.

Please include images, scene and log files whenever possible as this helps the community answer your questions.

Instructions for generating full verbosity log files are available for MtoA, MaxtoA, C4DtoA, HtoA, KtoA, and Kick.

If you are looking for Arnold Documentation and Support please visit the Arnold Support site.

To try Arnold please visit the Arnold Trial page.

Bottom No panel present for this section.